Improper authentication vulnerability in Cybozu Garoon 4.0.0 to 4.10.3 allows remote attackers to obtain data in the affected product via the API.
https://jvn.jp/en/jp/JVN35649781/index.html
https://kb.cybozu.support/article/36118/
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-5563